MX2007012962A

MX2007012962A - Accumulator.

Info

Publication number: MX2007012962A
Application number: MX2007012962A
Authority: MX
Inventors: Hans Muehe
Original assignee: Vb Autobatterie Gmbh & Co Kgaa
Priority date: 2005-05-10
Filing date: 2006-05-03
Publication date: 2008-10-24
Also published as: DE102005021421B3; ATE424623T1; DE502006003018D1; WO2006119731A8; CN101292375B; KR101100513B1; ES2323653T3; BRPI0605931B1; PL1880432T3; WO2006119731A2; JP5048652B2; EP1880432B1; KR20080035507A; US20080032186A1; CN101292375A; JP2009501407A; US7504175B2; BRPI0605931A2; WO2006119731A3; EP1880432A2

Abstract

An accumulator (6) comprises a battery housing subdivided into cell vessels, a plurality of positive and negative electrode plates which are separated by separators and stacked in parallel to give electrode plate stacks, and a lower cover (8) tightly obturating the cell vessels. The accumulator is provided with openings (9) on the lower cover (8) for the cell vessels, said openings running into a degassing channel system (1) placed on the lower cover (8). Annular elevations (18) are formed onto the lower cover (8) next to each opening (9). The degassing channel system (1) is provided with fastening means (12, 21, 22) for bracing the degassing channel system (1) on the lower cover (8) in such a manner that the elevations (18) seal the openings (9) leading towards the degassing channel system (1) by surface pressure.

Description

ACCUMULATOR DESCRIPTION OF THE INVENTION The invention relates to an accumulator comprising an accumulator box subdivided into several element containers, a multiplicity of electrode plates, stacked parallel to each other in stacks of electrode plates, separated from one another by spacers on positive electrode plates and negative, and comprising a lower lid that closes the element containers in a watertight manner, the lower lid having openings for the element containers and opening the openings in a system of worn channels inserted on the lower lid. Accumulators of this type are known in particular as lead accumulators for running batteries I in motor vehicles. Ij j In the operation of the accumulators a gas is generated that must be evacuated from the element vessels. For i it f ?? The openings are provided upwards in the element containers that open into a degassing chamber system. The degassing chamber system is branched by a multiplicity of deflection ribs in such a way that a labyrinth is formed for the electrolyte liquid which can oscillate i through the openings of the element containers to the cavity. Also the gas flow carries electrolyte and can collide with the deflection nerves and condense there. The system of degassing channels has a slope such that the electrolyte liquid can flow back into the element container. In EP 1 901 356 a multi-cell accumulator with a cover bead is shown which closes the filling openings and releases, in the superimposed state, the degassing openings for the individual cells. In each filling opening there is a displaceable tube element that is displaced towards the inside of the cell when the cover bead is superimposed and opens at least towards a degassing opening. Sealing occurs in this case in conifferent sealing surfaces of the tube section. From EP 1 017 119 Al an accumulator is known in which the filling openings in a lower lid of a battery element container are closed by means of a degassing channel element which is superimposed on the bottom cover and which comprises sections tube with degassing valves to be inserted into the openings. The tube sections are fixed with elastic hooks that hook into the interior of the cell with the wall of the opening. The The opening of the opening is carried out radially therewith with the aid of a press fit of the tube sections extending into the openings. ! From US Pat. No. 4,348,446 an accumulator is known in which a system of gasification channels is superimposed on the lower cover comprising the openings towards the element containers. Again, the sealing of the tubular degassing valves that extend into the opening is made radially, but with the help of sealing rings running around the external wall of the tube sections. It is also known from US Pat. No. 3,597,280 to use an accumulator with a system of superposed degassing channels in which the system of degassing channels is inserted into the element containers with the aid of valve plugs projecting towards the interior of the opening. The sealing and fixing of the degassing channel system in the element containers is carried out by pressurized seating of the valve plugs in the openings. A problem of these conventional accumulators represents the sealing of the openings in the lower cover towards the system of degassing channels due to the production tolerances. The aim of the invention was, therefore, to create an accumulator improved in this genre in which a reliable and sealed seat of the system of degassing channels is subsequently superimposed. The objective is met inventively by the accumulator of this kind because an adjacent annular bulge is attached by molding in each of the openings and because the system of degassing channels has fixing elements to pressurize the system of gasification channels so in the lower cover that is made, together with the bulges, a filling of the opening to the system of degassing channels by pressure per area. Unlike conventional radial seals in the inner wall of the opening it is proposed to make the seal so that it extends around the opening with the help of a pressure per area of the degassing channel system on the upper face of the opening. lower cap. Even in the case of a displacement of the support surfaces for the joint, due to production tolerances, a seat is guaranteed} ) leakage of the system of degassing channels in the lower cover I. In order to achieve a sealing of the opening by a pressure per area, annular bulges are provided in the lower cover adjacent to an opening that provide a watertight counter of the annular watering with the degassing channel system when fixing the channel system. of degassing in the lower cover. Preferably, in the degassing channel system having the bulges, corresponding seals are provided. Alternatively or additionally, the bulges can also be special shutters. The seals may be formed in this, preferably, of a flexible material so that they are compressed by snapping the system of degassing channels in the bottom cover and sealing in this manner. A particular advantage is if the seals are joined to the material of the lower or upper top respectively by injection molding by means of the 2-component mixture. The degassing channel system preferably has a cavity between a floor and the top cover and deflection ribs extending between the floor and the top cover to form the canalei system. In a preferred embodiment, catch hooks are provided.An elastic feature on the floor of the degassing channel system so that it engages in respective openings in the lower cover projecting from the cavidac downwards. The length of the elastic retaining hooks is precisely designed in such a way that the elastic retaining hooks projecting into the openings, by placing the system of degassing channels in the upper cover block this with the lid lower and guarantee a pressure per area sufficient to seal the openings. By tensioning the degassing channel system in the region of the openings against the bottom cover, a pressure per area is advantageously ensured eg in the region of the openings which is independent of the greenness of the degassing channel system and the lower cover. I The openings in the lower lid preferably have tube joints projecting into the interior of the element containers. This has the advantage that is achieved, in particular together with the elastic retaining hooks, an easier installation of the lower lid system and an elastic at the ends A particular advantage is also provided when walls j are projected on the lower lid projecting from the element containers having retaining projections and / or ratchet grooves. The degassing channel system has elastic retaining hooks and / or complementary guide projections with the retaining projections respectively with the ratchet grooves for tensioning the degassing channel system in the lower cover and fixing it there. The invention is explained below in more detail by way of the accompanying drawings, by way of example. In these it shows: Figure 1 - a view from above on a system of degassing channels having deflection ribs forming a labyrinth; Figure 2 - a view from above on a lead accumulator having six openings that open in each case in an element container, without the system of degassing canals; Figure 3 - an exploded cross-sectional view of the degassing channel system according to Figure 1; ! Figure 4 - a side elevational view of the degassing channels of Figure 1; Figure 5 - a sectional view of the lower lid of the lead accumulator according to figure 2 with the degassing channel system superimposed; Figure 6 - a partial longitudinal section through; of the accumulator according to figure 2 with the degassing channel system superimposed; Figure 7 - a partial sectional view of the degassing channel system near a seal extending around a degassing opening in the lower part of the degassing and bulging channel system in the lower lid of the accumulator; ! Figure 8 - a partial section view of the degassing channel system near a bulge extending around a degassing opening in the upper part of the degassing and sealing channel system in the lower lid of the accumulator; Figure 9 - Partially sectioned view of a second mode of the accumulator with the system of degassing channels fixed; 1 Figure 10 - Partially sectioned view of a third modality of the accumulator with the system of degassing channels fixed. Figure 1 shows a sectional view of a system 1 of degassing channels as seen from above. The channel system of I rectangular degassing has external walls 2 that extend around the outer periphery, so I as a multiplicity of deflection ribs 3 that extend into the floor of the channel system i degassing to an upper top cover. The deflection ribs 3 serve to retain the electrolyte in all the tilting and tumbling positions of the accumulator, when the electrolyte oscillates through the degassing openings 5 towards the cavity in the system 1 of degassing channels. This is outlined by way of example arrows. Figure 2 shows a view from above) on an accumulator 6, having a positive and negative pole 7a, 7b for the electrical connection. The accumulator 6 is separated into six element containers. In the upper lid 8 of the accumulator 6 there are provided openings 9 that open into the element containers. In the illustrated embodiment, an opening 9 is provided for each element container. However, alternative modalities in which two, three or more apertures per element container are provided are also conceivable. In particular, it is possible to imagine a way in which the filling and control opening, which can be closed with a The stopper is provided separately from the waste openings. In the accumulator, it is provided to fit the system 1 of degassing channels on top of the upper lid 8 of the accumulator 6 and thereby close the openings 9.

Figure 3 shows a cross-sectional view of the system 1 of degassing channels, which is composed of a lower part 10 and an upper part 11. The upper part 11 is welded in this with the lower part 10 or snapped in some other way stay. Downwardly elastic retaining hooks 12 project from the lower part 10. These are arranged and aligned so that they project in each case into an associated opening 9 and engage there with the lower cover 8 of the accumulator 6. The elastic retaining hooks 12 are formed as a segment of cylinal tube for each opening 9. or as several elastic retaining hooks 12 arranged at a distance from one another in a circular path. It is further appreciated that a degassing valve 13 is provided in the degassing opening surrounded by the elastic retaining hooks 12 and having a pipe connection projecting downwards in the direction of the element containers and upwards in the direction from part 11 above. The degassing valve 13 allows gas to escape even when the electrolyte exiting into the system 1 of degassing channels flows back through the return flow opening to the cell. In addition, a gas removal channel 14 is sketched by which the gas is conducted by a protection element 15 against inflammation to the outside and the environment. From FIG. 3 it can be seen that on the lower face of the system 1 of degassing channels an annular sealing element 16 is provided in each opening extending around the elastic retaining hooks 12. Figure 4 allows to appreciate once again an unseparated side view of system 1 of degassing channels. From figure 5 it can be seen that the system 1 of degassing channels is fitted in the lower cover 8 of the accumulator 6 in such a way that the elastic retaining hooks 12 project into the interior of the openings 9. The openings 9 have a connection 17 of tube that s < - extends downwards to the inside of the respective element container and a bulge-shaped elevation 18 on the upper face of the lower lid 8. The bulge-shaped elevation 18 completely surrounds the opening 8 and closes the opening 9 outwards, when the system 1 of the degassing channels is pressurized on the lower cover 8 with the help of elastic retaining hooks which engage in the tubing 17 of †. The bulge-shaped elevation 18 then rests on the annular sealing element 16 and, owing to the area pressures guaranteed by the elastic retaining hooks 12, provides a sealed seat. Figure 6 shows a view of a longitudinal section through an accumulator 6 with system 1 of degassing channels superimposed. It becomes clear that the annular sealing elements 16 which are preferably flexible are firmly pressed on the elevations 18 in the form of a bulge and thus ensure a seal of the opening 9 against the external space of the environment. The element containers are thus opened only through the degassing valves 13 into the cavity of the system 1 of degassing channels. With the help of the deflection ribs 3 the distance of the electrolyte to the ignition protection element 15 is maintained and the gas can flow outwards through the inflammation protection element 15 through the gas conduit channel 14 I went outside to the environment. Figure 7 shows a side sectional view of a segment that is partially inserted in the tube joint 17 of the lower lid 8 with its elastic retaining hooks 12 that surround the opening 9 and project downwards. When the system 1 of degassing channels is completely engaged in the lower cover 8, then the elastic retaining hooks 12 are locked with their wings at the lower end at the lower edge of the pipe connector 17. It can be seen that degassing valves 13 are provided in the opening 9 in the direction of the cavity of system 1 of degassing channels, to retain, as far as possible, the electrolyte that fluctuates in the cell even when tilting the accumulator and allowing in any case the escape of the released gas. In the embodiment shown, an elevation 18 in the form of a bulge is provided which surrounds the opening 9 in the lower I lid 6 in the form of a ring. On the underside of the lower lid, a supplementary annular flexible sealing element 16 is arranged which presses against the lifting 18 in the form of a bulge when the system 1 of degassing channels is firmly seated in the lower cover 8. Figure 8 shows a mode slightly modified in comparison with figure 7. The only difference is that an annular sealing element 16 is arranged on the upper face of the lower cover 8 and acts together with the lifting 18 in the form of watering which extends in the form of a ring in the lower face of the lower part 10 of the system 1 of degassing channels and whose radius is preferably chosen in such a way that it corresponds to the median radius of the annular sealing element 16. Figure 9 shows a second I the storage device 6 in which locking projections 19 are provided in walls 20 projecting in the lower lid 8 upwards in the opposite direction to the element containers. The system 1 of degassing channels has ratchet projections 21 or resilient retaining hooks 22 that complement the locking projections 19 for pressing the system 1 of degassing channels with sufficient pressure per area in the region of the openings on the elevations. 18 in the form of abujltamientos, provided there. The system 1 of degassing channels is simply inserted into the depression of the accumulator 6 formed by the walls 20 and is blocked there. Figure 10 shows a third embodiment of the accumulator 6 in which blocking projections 19 are provided on the walls on both sides; 20 projecting in the lower cover 8 in the opposite direction to the element containers. At the side edges of the degassing system 1, resilient retaining hooks 22 are provided, adjacent to the locking projections 19, which cooperate with the locking projections 19 which engage the springs below the locking projections 19 due to their force elastic, facing outwards, in the opposite direction to the lateral edges of the system 1 of degassing channels, when the system 1 of degassing channels is inserted in the depression of the accumulator cover, i.e., between the walls 20. In FIGS. 9 and 10 it is also possible to see the gab of the exhaust channel 14 that opens laterally from the system of degassing channels. i I i

Claims

1. Accumulator, comprising a battery case subdivided into element containers, a multiplicity of positive and negative electrode plates, stacked in stacks 1 of parallel electrode plates one next to the other, I separated one from the other by separators, and comprising a lower lid sealingly closes the element containers, the lower lid having openings for the element containers and opening the openings in a system of degassing channels superimposed on the lower lid, characterized in that in the lower lid, adjacent to each opening, annular elevations are molded and the degassing channel system has fastening elements for tensioning the degassing channel system in such a manner in the lower cover that, together with the elevations, a sealing of the openings is made in relation to the opening. system of greasing channels thanks to the pressure per area. !

2. Accumulator according to claim 1, I characterized in that in the degassing channel system, seals corresponding to the elevations are being provided.

3. Accumulator according to claim 1 or 2, characterized in that the elevations are seals.

4. Accumulator according to claim 2 or 3, characterized in that the seals are flexible sealing rings.

5. Accumulator according to one of claims 2 I to 4, i characterized in that the seals are joined I by injection molding using the two method I componjentes.

6. Accumulator according to one of the claims, because the system of channels of a cavity between a floor and a top cover and deflection ribs are arranged between the floor and the top cover constituting the system i of degassing channels. I

7. Accumulator according to claim 6, characterized by elastic retaining hooks that are pressure per area sufficient to seal the i opening.

8. Accumulator according to one of the preceding claims, characterized in that the openings in the lower cover have a pipe connection projecting into the interior of the element containers. !

9. Accumulator according to one of the preceding claims, characterized in that in the lower cover there are walls projecting upwards in the opposite direction to the element containers having locking projections and / or ratchet grooves that tighten! the system of degassing channels in the lower cover with elastic retaining hooks and / or corresponding guide projections. i